package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {


    @Autowired
    OrderMapper orderMapper;
    @Autowired
    AddressBookMapper addressBookMapper;
    @Autowired
    UserMapper userMapper;
    @Autowired
    ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户提交订单
     *
     * @param dto
     * @return
     */
    @Transactional
    @Override
    public OrderSubmitVO submit(OrdersSubmitDTO dto) {

        Long userId = BaseContext.getCurrentId();
        // 查询用户信息
        User user = userMapper.selectById(userId);
        // 查询地址信息
        AddressBook addressBook = addressBookMapper.getById(dto.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        // 查询购物车数据
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCarts = shoppingCartMapper.selectBy(shoppingCart);
        if (shoppingCarts == null || shoppingCarts.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        // 1.添加订单信息到订单表
        Orders orders = new Orders();
        BeanUtils.copyProperties(dto,orders);
        orders.setNumber(System.currentTimeMillis()+"");
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setUserId(userId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(addressBook.getDetail());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserName(user.getName());
        orderMapper.insert(orders);
        // 2.添加订单明细信息到订单明细表
        List<OrderDetail> orderDetails = new ArrayList<>();
        shoppingCarts.forEach(cart -> {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail,"id");
            orderDetail.setOrderId(orders.getId());
            orderDetails.add(orderDetail);
        });
        orderDetailMapper.insertBatch(orderDetails);
        // 3.清空购物车
        shoppingCartMapper.delectByUserId(userId);
        return OrderSubmitVO.builder()
                .id(orders.getId())
                .orderAmount(orders.getAmount())
                .orderNumber(orders.getNumber())
                .orderTime(orders.getOrderTime())
                .build();
    }


    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        // Long userId = BaseContext.getCurrentId();
        // User user = userMapper.getById(userId);
        //
        // //调用微信支付接口，生成预支付交易单
        // JSONObject jsonObject = weChatPayUtil.pay(
        //         ordersPaymentDTO.getOrderNumber(), //商户订单号
        //         new BigDecimal(0.01), //支付金额，单位 元
        //         "苍穹外卖订单", //商品描述
        //         user.getOpenid() //微信用户的openid
        // );
        //
        // if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
        //     throw new OrderBusinessException("该订单已支付");
        // }
        //
        // OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        // vo.setPackageStr(jsonObject.getString("package"));
        paySuccess(ordersPaymentDTO.getOrderNumber());
        return new OrderPaymentVO();
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        // 支付成功之后 像客户端发送消息
        Map map = new HashMap();
        map.put("type", 1);//消息类型，1表示来单提醒
        map.put("orderId", orders.getId());
        map.put("content", "订单号：" + outTradeNo);

        //通过WebSocket实现来单提醒，向客户端浏览器推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    @Override
    public PageResult historyOrders(OrdersPageQueryDTO dto) {
        PageHelper.startPage(dto.getPage(),dto.getPageSize());

        dto.setUserId(BaseContext.getCurrentId());
        Page<Orders> ordersList = (Page<Orders>) orderMapper.selectBy(dto);
        List<OrderVO> orderVOList = new ArrayList<>();
        if (ordersList != null && ordersList.size() > 0) {
            ordersList.forEach(order -> {
                OrderVO orderVO = new OrderVO();
                List<OrderDetail> orderDetails = orderDetailMapper.selectByOrderId(order.getId());
                BeanUtils.copyProperties(order,orderVO);
                orderVO.setOrderDetailList(orderDetails);
            });
        }
        return new PageResult(ordersList.getTotal(),orderVOList);
    }

    @Override
    public OrderVO orderDetail(Long id) {
        OrderVO orderVO = orderMapper.selectById(id);
        List<OrderDetail> orderDetails = orderDetailMapper.selectByOrderId(orderVO.getId());
        orderVO.setOrderDetailList(orderDetails);
        return orderVO;
    }

    @Override
    public void cancel(Long id) {
        Orders ordersDB = orderMapper.selectById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        // 订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // // 订单处于待接单状态下取消，需要进行退款
        // if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
        //     // 调用微信支付退款接口
        //     weChatPayUtil.refund(
        //             ordersDB.getNumber(), // 商户订单号
        //             ordersDB.getNumber(), // 商户退款单号
        //             new BigDecimal(0.01), // 退款金额，单位 元
        //             new BigDecimal(0.01));// 原订单金额
        //
        //     // 支付状态修改为 退款
        //     orders.setPayStatus(Orders.REFUND);
        // }
        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    @Override
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.selectByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO dto) {
        PageHelper.startPage(dto.getPage(),dto.getPageSize());
        Page<Orders> ordersList = (Page<Orders>) orderMapper.selectBy(dto);
        List<OrderVO> orderVOList = new ArrayList<>();
        if (ordersList != null && ordersList.size() > 0) {
            ordersList.forEach(order -> {
                OrderVO orderVO = new OrderVO();
                List<OrderDetail> orderDetails = orderDetailMapper.selectByOrderId(order.getId());
                BeanUtils.copyProperties(order,orderVO);
                String dishs = orderDetails.stream().map(OrderDetail::getName).collect(Collectors.joining(","));
                orderVO.setOrderDishes(dishs);
                orderVOList.add(orderVO);
            });
        }
        return new PageResult(ordersList.getTotal(),orderVOList);
    }

    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    @Override
    public void confirm(OrdersConfirmDTO dto) {
        Orders orders = Orders.builder()
                .id(dto.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    @Override
    public void rejection(OrdersRejectionDTO dto) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.selectById(dto.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 支付状态
        // Integer payStatus = ordersDB.getPayStatus();
        // if (payStatus == Orders.PAID) {
        //     // 用户已支付，需要退款
        //     String refund = weChatPayUtil.refund(
        //             ordersDB.getNumber(),
        //             ordersDB.getNumber(),
        //             new BigDecimal(0.01),
        //             new BigDecimal(0.01));
        //     log.info("申请退款：{}", refund);
        // }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(dto.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    @Override
    public void adminCancel(OrdersCancelDTO dto) {
        // 根据id查询订单
        // Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        // 支付状态
        // Integer payStatus = ordersDB.getPayStatus();
        // if (payStatus == 1) {
        //     // 用户已支付，需要退款
        //     String refund = weChatPayUtil.refund(
        //             ordersDB.getNumber(),
        //             ordersDB.getNumber(),
        //             new BigDecimal(0.01),
        //             new BigDecimal(0.01));
        //     log.info("申请退款：{}", refund);
        // }

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(dto.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(dto.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    @Override
    public void complete(Long id) {
// 根据id查询订单
        Orders ordersDB = orderMapper.selectById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }


    @Override
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.selectById(id);

        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(orders);
    }

    @Override
    public void reminder(Long id) {
        // 查询订单是否存在
        Orders orders = orderMapper.selectById(id);
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //基于WebSocket实现催单
        Map map = new HashMap();
        map.put("type", 2);//2代表用户催单
        map.put("orderId", id);
        map.put("content", "订单号：" + orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}
